Pull socket



Patented Nov. `1, 1927-..

l vBENJAMIN ojWEBsTER, or* JACKSON, MioHIeAitAssieNonQBY MESNE ASSIGNMENTS, To nEYNonDssinrNe' COMPANY, or JACKSONWIICHIGAN, a CORPORATION; or

l yDELAWARE.

FP2-Mm PULL SOCKET.

- applicati@ med May 4, 192s. serieu No1. 1n6,es4.j e

`The invention relates -to al chain pull .soclet.`. .5' The object lof the present invention isto improve thev construction of ychain pull sock- .5 I.ets andto provide a simple, practical 'and eiiicient Vchain pull lsocket of -strong durabley and comparatively inexpensive yconstruction 'equipped with aswitch mechanism for con'- V trollingvthe circuit betweenthe centencontactfand the wiring terminal` thereof-adapti Vled to eect a rapid make and break'of the circuit and of producing a snap actionfin thefoperatio'nof the switch mechanism;

'A' further object of the invention is to lprovide -a chain socket of this lcharacter adapted to effectively l separate and protect the wiring terminals so that there will be.` no liability'of arcing Vorsparliing.

. With these and thervobjectsjin lviewfthe invention consistsy in the construction and novelcombination andv arrangement vof parts hereinafter fully described, illustrated in the accompanying drawings and pointed out in the/ claims -hereto appended,it"being r understood that various changes in the form,

Vproportion and vminor :details ofi. construction, within the scope 4ofthe claims, may be resorted to without departing from thevspirit or sacrificing any of theadvantages of the invention.' A "f i y In the drawings: p

Figure l is aside elevation of'a chain pull socket' constructed in accordance with this invention illustrating the arrangement of oneof the wiringcontacts.` .p -y Fig: 2 'is a similar view' showing the" opposite side lof the socket illustrating the arf rangement of the other Wiring contact. Y

FigQis a` plan view of vl.the -chain pull "-socketj n K l Fig.'y 4 is a reverse plan view ofthe same. "Figi" 5 'is a horizontal. sectional' view of the device on the line 5'-5 of Fig. l.y

Fig. 6"'is alongitudinal sectional view ap? proximately onathe line 6-6 of Fig,V 5. Fig. '7is a detail perspective View of the. chain guide. 'y L Fig. 8 is a'perspective View of theratchet illustrating 'the construction` of the ratchet 5 mechanismthe parts'b'eing separated and arrangedin juxtaposition;7 f-

Fig-9 is a-detail perspective viewofvthe'f `Wiring terminal of thelscrew shell contactgnying .drawings 'in which' HJ i,

- at its upper end with a binding screw 11x` of the insulating base is approximately .is illustrated the preferred embodimentfolf the invention l ldesignates an insulatingv basel consisting :of a single piece of.moldedf'Bake-v lite or other suitable insulating .materialand.v composed of a substantially circular-bottom portion and-v spaced upwardly project-ing p60 lugs Zand Bflocated at oppositelsidesoff-the f centerofthe insulating, baseand' forming al support for' a top or cap'plate 4 'also con structedof suitableinsulating material such as Bakelite. The cap or top plate issecu'red to, the lugs by means of spaced: longitudinal screws which extend entirely through the lugs 2 and .3 and the bottom ofthe insulating base and engage threaded apertures -in the opposite sides of a` substantially...U 70 shaped' plate'5 of the wiring terminal' 6= of the screw 'shell contact?. `.'lfhe'insulating baseisprovided at itsv lower` face with: an approximately U-shaped'boss 8 `fitting an opening 9 in the topfof thescrew'shell con tact y2' whereby tthe screw shell top `is inter.- locked with the insulatingbaseand -isheld against rotary. movement f thereon 1 so -fthat there will be no liability ofvturning the in# "1' sulating base orV screwishellfcontact when screwing the plug intoxa lampi orvotherin sertibledevice'into theshell contact 7. The

U-'shaped'-plate l5 of the wiringterminal conforms tothe .configuration ofthebosis-S of 'the klower 'face ofthe insulatingbaseand to the top 4'wall Vor portionof the screwshell contactand by being'engaged by`1th`e Popposite longitudinal .screws 'the screwishelljconi tact and its wiring:terminalare'firmlyattached to the insulating` basa- "The wiring terminal .6 whichis' in* colflsv'antfelectrical connection" with the screw shellfco'ntact consists of' the said plate 5 andV conductor barl extending upwardlyv exteriorly of lthel 'ini sulating base adjacent theT lifg 2 and it is rei c eived withina recess 10 ofthe bottomof the insulating base." The conductor 'bar or `body portion. of the wiring-terminal Gis provided and it vhas spaced projections 12 adjacent'` the vbinding screw for confining a vwireKF'lin engagement 'with the Screw; g v. Y.

The Center Contact 153 vhihisarfmged; A. within the lUshaped 1008s 8 ofthe 10W er, facer shaped andyhas" va resilient lower po provided with asubstantallyconeavo=con 1 ver enlargement or head trier engagement duced as clearly` shown 'i'n AFig. ff andthe'rece'sses'`V of the -insulating base andthe top plate'thereof 'confornivto the configuration of the arms. Thefrotary controller which actuates-themovable switch member is constructed of a singlej'piec-e of molded Bakelite or othersuitable insulating matei'ial and it is spaced lfrom the bottom of the insulating base by a sleeve 49 fitting in a recess or counterb'oreof the bottom of the insulatingV base but-the' sleeve or bushing 9 may be formed integralfwvith vthe controller and consist of a reducedportionthereof if desired.

'The-upper stationary switch'contact Ais secured tofthe upper face or seatof the extension of the lug'Z by meansl of a' screw 50 or. oth'erff'suitab'le 'fastening' device which is thesaid extension:

l l.- A pull socketucomprising 'an' insulating mounted' in asuitable bore or o'peningofv n y Y l .cainiarranged to engagcthe connectingfpor- "tion: of the lmovable switch member Vfor-ecar-V baseli-avi-ngl'spaced upwardly extending 'lugs located at opposite sides of the base,-theV space fbetwe-en the lugs 4extending entirely across the base to provide a relatively large air space, one of the lugs being provided at one edge with a flange forming a guard or shield and having at the other end an eXtension forming a seat, a top plate secured to the said lugs, a shell contact secured to the insulating base and having a wiring terminal located at the said iange,a center contact also secured to the insulating base, av lower switch contact mounted upon the base and connected with the center contact, an upper stationary switch contact mounted on the said extension of said lugand having a wiring terminal, and a movable switch member cooperating with the stationary switch contacts.

2. A pull socket including an insulating base having spaced upwardly extending lugs, a shell contact secured to the insulating base y and having a wiring terminal located at one side of the said base, a center contact also secured to the base, upper and lower stationary switch contacts located at the opposite side of the base from the said wiring terminal, the lower contactbeing connected with the center contact and the upper contact'being provided with a wiring terminal, a movable switch member composed of spaced knife blades and a connecting portion, the knife blades beingadapted to enga-ge with the stationary switch contacts, a rotary controller provided with a peripheral cam arn vranged to engage the connecting portion of the movable switch member for carrying the .knife blades into engagement with the stationary switch contacts, the peripheral cams being spaced apart to provide recesses toreceive the connecting portion of the movable switch member to permit the latter to be carried outof engagementwith the stationary switch contacts, and a spring for moving the contacts:`

switch member away-,from ythe stationary ''i 3.1'A `pull `socket iiicludingV insulating basehaving spaced ,upwardly extendinglugs,

a shellcontact secured to 'theinsulatingbase and having a wiringterminal located atone i sideof the said base, a. center'fcontactalso securedto the base, upper and llower'stationaryswitch contacts located at the opposite sidefof the base fromthe saidwiring terminal, .theflower contact being connected with the center'contact'and `the nppercontact (being provided with a vwiring terminal,

a movable 'switch lmember?composedl` A.ofl

spaced' knifeV blades and a connecting por-l tion,l the'knife blades beingr adapted to. en-Y gage with the stationary switch contactsp'a rotary controller provided with a peripheral ry-ng the knifeblades intoengagementiwiththe stationary lswitch contacts, the) peripheral camsbeing spaced apart tov'prfovide' re-' the rotary controller, and an oscillatory actuator provided with ratchet teeth cooperating with the ratchet teeth of thecontroller to impart a step by step rotation to thesame. 4. A, pull socket including an insulating base provided with. spaced upwardly extending'lugs, a top plate mounted on the lugs and f having .a curved depending flange forming a f l j recess, upper andy lowerv stationary switch contacts mounted onv the base, a 4movable switch member having horizontally swinging switch blades having free terminal portions located ati one end of the V:movable switch member and arranged to, engage the stationary switch contacts, said movable switch member being provided at the other end with alprojection, a spring foi; urging the movable r i switch member away from the stationary*l f contacts,` a rotary controller having a series of ratchet teeth and provided with peripheral cams fo-r engaging the said projection switch blades into engagement withthe stationary contacts, an oscillatoryactuator hav- Y ing ratchet teeth for imparting a step by step rotation to the controller, a coiled spring housed within the recess of thesaid curved flange and bearing against the same and against the actuator for moving the same inl y one direction, and a pull chain for moving theactuator in the opposite direction.

51A pull socket including a base, a shell contact securedto the basel and having a wiring terminal, a vcenter contact also secured tothe base,1upperrand lower stationary switch contacts, thelower contact being l5,v v of the movable switch member to carry the connected with the center contact and the upper contact being provided with a wiring terminal, and a horizontal movable switch member arranged to swing into and out of Vengagement with the stationary switch contacts, a rotary controller provided with means for actuating ythe movable switch member and having ratchet teeth, and an oscillatory actuator having radially disposed arms bevelled to form teeth for engaging the ratchet teeth of the controller, one of the armsbeing provided with an integral vertically disposedapproximately U-shaped portion open at the top to permit the links `of avchain to be introduced between the sides of the U-shaped portion andengaged with the same. y

Gip-A pull socket including an insulating base having spaced upwardly extending lugs, a shell contact secured to the insulating base and having a wiring terminal located at one sideV of the said base, a center contact also secured to the base, upper and lower stationary switch contacts located at the oppoon the base and having upper and lower horizontally swinging knife blades cooperating' with the stationary switch contacts and located at one end of the movable switch member, the movable .switch member being provided at the otherend with a laterally extending projection, a coiled spring connected with the movable switch member for urging the same away from the stationary switch contacts, a rotary lcontroller vprovided with means for engaging the l'said pro= jection for moving the switch member into engagement with the stationary switch con',- tacts and ratchet mechanism including a pull chain for imparting a step by step rotary movementto the controller.

In testimony whereof Iv have hereunto set my hand. i.

BENJ. O. WEBSTER. 

